404 handling documentation

readme.md

@@ -34,6 +34,7 @@ npm install @mateothegreat/svelte5-router
     - [Using Components \& Snippets](#using-components--snippets)
     - [Accessing Parameters](#accessing-parameters)
     - [Passing Props](#passing-props)
+    - [Not Found](#not-found)
   - [Hooks](#hooks)
     - [States](#states)
       - [Navigation State](#navigation-state)
@@ -195,6 +196,33 @@ Then, in your component, you can access the prop like this:
 <pre>{JSON.stringify(myProps, null, 2)}</pre>
 ```
 
+### Not Found
+
+To handle 404 errors, you can use the `.*` or `.+` pattern such as:
+
+```ts
+const routes: Route[] = [
+  // This will match the root path ("/") and render the Homepage component:
+  {
+    path: "^/$",
+    component: Homepage
+  },
+  {
+    path: "profile",
+    component: Profile
+  },
+  // This will match any path that is not found:
+  {
+    path: ".+",
+    component: NotFound
+  }
+];
+```
+
+Notice the `^/$` pattern. This matches the root path ("/")indicating that this is the first "default" route.
+
+Now, after this route, we have a catch-all route that matches any path at last indicating the route is not found.
+
 ## Hooks
 
 Use `pre` and `post` hooks to run before and after a route is rendered to do things like authentication, logging, etc.

test/app/src/app.svelte

@@ -4,6 +4,7 @@
   import { Github, Home } from "lucide-svelte";
   import Default from "./lib/default.svelte";
   import Delayed from "./lib/delayed.svelte";
+  import NotFound from "./lib/not-found.svelte";
   import Params from "./lib/params/params.svelte";
   import Props from "./lib/props/props.svelte";
   import BankAccount from "./lib/protected/bank-account.svelte";
@@ -13,7 +14,7 @@
 
   const routes: Route[] = [
     {
-      path: "",
+      path: "^/$",
       component: Default
     },
     {
@@ -102,6 +103,10 @@
     {
       path: "query-redirect",
       component: QueryRedirect
+    },
+    {
+      path: ".+",
+      component: NotFound
     }
   ];
 
@@ -160,6 +165,7 @@
       Call the <span class="rounded bg-black px-2 py-0.5 text-green-500">goto("/a");</span> method
     </button>
     <a use:route href="/query-redirect" class="py-1hover:bg-pink-800 rounded bg-blue-600 px-3 py-1">/query-redirect</a>
+    <a use:route href="/not-found" class="py-1hover:bg-pink-800 rounded bg-slate-600 px-3 py-1">/not-found</a>
   </div>
   <div class=" w-full flex-1 bg-zinc-900 p-6">
     <div class="flex flex-col gap-4 rounded-lg bg-zinc-950 p-4 shadow-xl">

test/app/src/lib/not-found.svelte

@@ -0,0 +1 @@
+404 not found :(